Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Medellín emerges as the optimal May destination with an overall TripTiming Index of 57/100 vs 54/100 for Cartagena (+3 point advantage). Medellín experiences more manageable visitor density and shorter landmark queues (carrying capacity score 67/100 vs 58/100 in Cartagena). This is reinforced by lower lodging rates (~$94/night vs ~$188/night, saving ~$658 over 7 nights).